package cn.layfolk.bio;

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * @Author 王津
 * @Date 2020/9/22
 * @Version 1.0
 */
public class BIOServer {


    public static void main(String[] args) throws Exception {
        //线程池机制
        //1.创建一线程池
        //2.如果有客户端连接，就创建一个线程，与之通讯(单独写一个方法)
        ExecutorService newCachedThreadPool = Executors.newCachedThreadPool();

        //创建ServerSocket
        ServerSocket serverSocket = new ServerSocket(6666);

        System.out.println("服务器启动了");

        while (true) {

            //监听，等待客户端连接
            System.out.println("等待连接。。。");
            final Socket socket = serverSocket.accept();
            System.out.println("连接到一个客户端");

            //就创建一个线程，与之通讯(单独写一个方法)
            newCachedThreadPool.execute(new Runnable() {
                public void run() {
                    // 我们重写，可以和客户端通信
                    handler(socket);
                }
            });
            // 客户端 telnet 127.0.0.1 6666 ctrl+]      send hello;
        }

    }

    //编写一个handler方法，和客户端通讯
    public static void handler(Socket socket) {

        try {
            System.out.println("线程信息 id = " + Thread.currentThread().getId() + "名字=" + Thread.currentThread().getName());
            byte[] bytes = new byte[1024];
            // 通过socket 获取输入流
            InputStream inputStream = socket.getInputStream();

            //循环的读取客户端发送的数据
            while (true) {

                System.out.println("线程信息 id = " + Thread.currentThread().getId() + "名字=" + Thread.currentThread().getName());

                System.out.println("read...");
                int read = inputStream.read(bytes);
                if (read != -1) {
                    // 输出客户端发送的数据
                    System.out.println(new String(bytes, 0, read));
                } else {
                    break;
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            System.out.println("关闭和client的连接");
            try {
                socket.close();
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }
}

